[AK4679]
■ PLL Mode (PMPLL bit = “1”) (Audio I/F)
When PMPLL bit is “1”, a fully integrated analog phase locked loop (PLL) generates clock that is selected by the PLL3-0
and FS3-0 bits. The PLL lock time is shown in Table 5. This lock time is when the audio I/F is supplied stable clocks after
PLL is powered-up (PMPLL bit = “0” → “1”) or when the sampling frequency changes.
1) Setting of PLL Mode
PLL Lock
PLL3
bit
PLL2
bit
PLL1
bit
PLL0
bit
PLL Reference
Clock Input Pin
Input
Frequency
Mode
Time
(max)
2ms
2
3
4
5
6
0
0
0
0
0
0
1
1
1
1
1
1
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
1
0
0
1
0
1
0
1
0
1
0
0
1
0
1
0
BICK pin
BICK pin
MCKI pin
MCKI pin
MCKI pin
MCKI pin
MCKI pin
MCKI pin
MCKI pin
MCKI pin
MCKI pin
MCKI pin
32fs
64fs
2ms
11.2896MHz
12.288MHz
12MHz
24MHz
19.2MHz
13MHz
26MHz
13.5MHz
27MHz
25MHz
N/A
10ms
10ms
10ms
10ms
10ms
10ms
10ms
10ms
10ms
10ms
(default)
7
8
10
11
12
13
14
Others
0
1
1
1
Others
Table 5. Setting of PLL Mode (*fs: Sampling Frequency, N/A: Not available)
2) Setting of sampling frequency in PLL Mode
When PLL reference clock input is MCKI and BICK pins, the sampling frequency is selected by FS3-0 bits as defined in
Table 6.
Sampling Frequency (Note
Mode
FS3 bit
FS2 bit
FS1 bit
FS0 bit
74)
0
1
2
3
5
0
0
0
0
0
0
1
1
1
0
0
0
0
1
1
0
0
1
0
0
1
1
0
1
1
1
1
0
1
0
1
1
1
0
1
1
8kHz mode
12kHz mode
16kHz mode
24kHz mode
11.025kHz mode
22.05kHz mode
32kHz mode
48kHz mode
44.1kHz mode
N/A
7
10
11
15
Others
(default)
Others
Table 6. Setting of Sampling Frequency at PMPLL bit = “1” (N/A: Not available)
Note 74. When the MCKI pin is the PLL reference clock input, the sampling frequency generated by PLL differs from the
sampling frequency of mode name in some combinations of MCKI frequency(PLL3-0 bits) and sampling
frequency (FS3-0 bits). Refer to Table 7 for the details of sampling frequency. In master mode, LRCK and BICK
output frequency correspond to sampling frequencies shown in Table 7. When the BICK pin is the PLL reference
clock input, the sampling frequency generated by PLL is the same sampling frequency of mode name.
MS1402-E-06
2013/02
- 48 -
AKM [ ASAHI KASEI MICROSYSTEMS ]
